package com.isunland.managesystem.common;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.view.WindowManager;
import android.widget.Toast;
import com.isunland.managesystem.ui.SplashActivity;
import com.isunland.managesystem.utils.FileUtil;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
 *
 * @author user
 */
public class CrashHandler implements UncaughtExceptionHandler {

  public static final String TAG = "CrashHandler";

  //系统默认的UncaughtException处理类
  private Thread.UncaughtExceptionHandler mDefaultHandler;
  //CrashHandler实例
  private static CrashHandler INSTANCE = new CrashHandler();
  //程序的Context对象
  private Context mContext;
  //用来存储设备信息和异常信息
  private Map<String, String> infos = new HashMap<String, String>();

  //用于格式化日期,作为日志文件名的一部分
  private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

  /** 保证只有一个CrashHandler实例 */
  private CrashHandler() {
  }

  /** 获取CrashHandler实例 ,单例模式 */
  public static CrashHandler getInstance() {
    return INSTANCE;
  }

  /**
   * 初始化
   */
  public void init(Context context) {
    mContext = context;
    //获取系统默认的UncaughtException处理器
    mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
    //设置该CrashHandler为程序的默认处理器
    Thread.setDefaultUncaughtExceptionHandler(this);
  }

  /**
   * 当UncaughtException发生时会转入该函数来处理
   */
  @Override public void uncaughtException(Thread thread, Throwable ex) {
    if (!handleException(ex) && mDefaultHandler != null) {
      //如果用户没有处理则让系统默认的异常处理器来处理
      mDefaultHandler.uncaughtException(thread, ex);
    } else {
      try {
        Thread.sleep(3000);
      } catch (InterruptedException e) {
        Log.e(TAG, "error : ", e);
      }
      //重启程序
      restartApp();
    }
  }

  /**
   * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
   *
   * @return true:如果处理了该异常信息;否则返回false.
   */
  private boolean handleException(final Throwable ex) {
    if (ex == null) {
      return false;
    }
    //使用Toast来显示异常信息
    new Thread() {
      @Override public void run() {
        Looper.prepare();
        Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG).show();
        Looper.loop();
      }
    }.start();
    Log.e(TAG, "error", ex);
    //收集设备参数信息
    collectDeviceInfo(mContext);
    //保存日志文件
    String fileName = saveCrashInfo2File(ex);
    //        if (fileName!=null) {
    //        	sendAppCrashReport(mContext, ex.toString(), new File(fileName));
    //
    //        }
    return true;
  }

  /**
   * 收集设备参数信息
   */
  public void collectDeviceInfo(Context ctx) {
    try {
      PackageManager pm = ctx.getPackageManager();
      PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
      if (pi != null) {
        String versionName = pi.versionName == null ? "null" : pi.versionName;
        String versionCode = pi.versionCode + "";
        infos.put("versionName", versionName);
        infos.put("versionCode", versionCode);
      }
    } catch (NameNotFoundException e) {
      Log.e(TAG, "an error occured when collect package info", e);
    }
    Field[] fields = Build.class.getDeclaredFields();
    for (Field field : fields) {
      try {
        field.setAccessible(true);
        infos.put(field.getName(), field.get(null).toString());
        Log.d(TAG, field.getName() + " : " + field.get(null));
      } catch (Exception e) {
        Log.e(TAG, "an error occured when collect crash info", e);
      }
    }
  }

  /**
   * 保存错误信息到文件中
   *
   * @return 返回文件名称, 便于将文件传送到服务器
   */
  private String saveCrashInfo2File(Throwable ex) {

    StringBuffer sb = new StringBuffer();
    for (Map.Entry<String, String> entry : infos.entrySet()) {
      String key = entry.getKey();
      String value = entry.getValue();
      sb.append(key + "=" + value + "\n");
    }

    Writer writer = new StringWriter();
    PrintWriter printWriter = new PrintWriter(writer);
    ex.printStackTrace(printWriter);
    Throwable cause = ex.getCause();
    while (cause != null) {
      cause.printStackTrace(printWriter);
      cause = cause.getCause();
    }
    printWriter.close();
    String result = writer.toString();
    sb.append(result);
    try {
      long timestamp = System.currentTimeMillis();
      String time = formatter.format(new Date());
      String fileName = "crash-" + time + "-" + timestamp + ".log";
      if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
        String path = FileUtil.getLogDir() + "/";
        File dir = new File(path);
        if (!dir.exists()) {
          dir.mkdirs();
        }
        FileOutputStream fos = new FileOutputStream(path + fileName);
        fos.write(sb.toString().getBytes());
        fos.close();
      }
      return fileName;
    } catch (Exception e) {
      Log.e(TAG, "an error occured while writing file...", e);
    }

    return null;
  }

  public void restartApp() {
    Intent intent = new Intent(mContext, SplashActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    mContext.startActivity(intent);
    android.os.Process.killProcess(android.os.Process.myPid());
  }

  private void sendAppCrashReport(final Context context, final String crashReport,
      final File file) {
    // Auto-generated method stub
    AlertDialog mDialog = null;
    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setIcon(android.R.drawable.ic_dialog_info);
    builder.setTitle("程序出错啦");
    builder.setMessage("请把错误报告以邮件的形式提交给我们，谢谢！");
    builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {

        // 发送异常报告
        try {
          //注释部分是已文字内容形式发送错误信息
          // Intent intent = new Intent(Intent.ACTION_SENDTO);
          // intent.setType("text/plain");
          // intent.putExtra(Intent.EXTRA_SUBJECT,
          // "推聊Android客户端 - 错误报告");
          // intent.putExtra(Intent.EXTRA_TEXT, crashReport);
          // intent.setData(Uri
          // .parse("mailto:way.ping.li@gmail.com"));
          // intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          // context.startActivity(intent);

          //下面是以附件形式发送邮件
          Intent intent = new Intent(Intent.ACTION_SEND);
          intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          String[] tos = { "wangyananbj@foxmail.com" };
          intent.putExtra(Intent.EXTRA_EMAIL, tos);

          intent.putExtra(Intent.EXTRA_SUBJECT, "错误报告");
          if (file != null) {
            intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
            intent.putExtra(Intent.EXTRA_TEXT, "请将此错误报告发送给我，以便我尽快修复此问题，谢谢合作！\n");
          } else {
            intent.putExtra(Intent.EXTRA_TEXT, "请将此错误报告发送给我，以便我尽快修复此问题，谢谢合作！\n" + crashReport);
          }
          intent.setType("text/plain");
          intent.setType("message/rfc882");
          Intent.createChooser(intent, "Choose Email Client");
          context.startActivity(intent);
        } catch (Exception e) {
          Toast.makeText(context, "There are no email clients installed.", Toast.LENGTH_SHORT)
              .show();
        } finally {
          dialog.dismiss();
          // 退出
          android.os.Process.killProcess(android.os.Process.myPid());
          System.exit(1);
        }
      }
    });
    builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        dialog.dismiss();
        // 退出
        android.os.Process.killProcess(android.os.Process.myPid());
        System.exit(1);
      }
    });
    mDialog = builder.create();
    mDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
    mDialog.show();
  }
}  